Measurement Category Hub

Angle & Geometry Converters & Calculators

Convert planar angles with mathematical precision across degrees, radians, gradians, arcminutes, and arcseconds. Use our universal interactive angle & geometry calculator below or select one of our dedicated conversion shortcuts.

Angle & Geometry

From: Degree

(°)

Example: 90 °

To: Radian

(rad)

e.g. 1.5708rad

Standard: π rad = 180° (1 rad ≈ 57.2958°)

Enter any number above to convert Degrees to Radians. Click (i) for brief unit info.

Popular Angle & Geometry Conversions

2 dedicated tools

Degrees to Radians Converter

Convert planar geometry angles from degrees (°) to radians (rad) with exact π factors.

radians = degrees × (π ÷ 180)

Radians to Degrees Converter

Convert mathematical radians (rad) to degrees (°).

degrees = radians × (180 ÷ π)

Supported Angle & Geometry Units & Standards

Unit Name	Symbol	Type / System	Relative Value
Degree	°	Derived Unit	1 ° = 0.017453292519943295 base
RadianBase SI	rad	SI Standard Unit	1 rad = 1 base
Gradian (Gon)	grad	Derived Unit	1 grad = 0.015707963267948967 base
Arcminute	arcmin	Derived Unit	1 arcmin = 0.0002908882086657216 base
Arcsecond	arcsec	Derived Unit	1 arcsec = 0.00000484813681109536 base
Revolution (Turn)	rev	Derived Unit	1 rev = 6.283185307179586 base

Angle & Geometry FAQs

In the International System of Units (SI) or standard physical conventions, the base reference unit is Radian. All linear conversions within this category are mathematically derived from this base factor.